![]() ![]() Mercury = pressure * 0.029529980164712 // Convert hectopascals to in of mercury.įloat seaLevelPressure = SENSORS_PRESSURE_SEALEVELHPA If(error != 0) // If there is an error, print it out. If(error != 0) // If there is an error, print it out.Įrror = compass.SetMeasurementMode(Measurement_Continuous) //Set the measurement mode to Continuous HMC5883L compass //The BMP085 has been replaced with the BMP180 but the code still works.Ĭompass = HMC5883L() // Construct a new HMC5883 compass.Įrror = compass.SetScale(1.3) // Set the scale of the compass. The original code was in Hectopascals, Celsius and Meters. I would also like to note that I wanted my readings in units that I am most familiar with so I modified the code to read in “inHg” of mercury for Pressure, Fahrenheit and Feet. You will have to import the library in your sketchbook folder. The BMP085 software from Adafruit was used to read the sensor since it was the most complete example I could find and I posted the links above. Doing this will allow me to breakup or separate the serial data in Processing as well as PHP and most other programming and scripting languages very easily. This will allow me to save it to a MySql database, CSV file or. I want the flexibility to use the data for most general applications so I am going to retrieve it with Comma’s following the serial output for each reading. The code has been modified for readability and this application. I am also using WAMP server but you can use any web development platform that includes a MySql database engine and PHP, I have been using WAMP for several years and accustomed to it. I will say that knowledge of all of the software is a plus in any case. Like most people starting to use the Arduino it can be a little overwhelming with the amount of information on how to do different things with the Arduino so I fell back on some of the things that I am familiar with PHP, HTML, MySQL but Arduino and Processing is all new to me so some things could have probably been done more efficiently. ![]() I have included the sample code that should be easy to follow and modify for your projects. I am going to start with the BMP 180 with the HMC5883L magnetometer for my project. As I am just learning to use the Arduino I will start by figuring out how to retrieve data from a sensor and then start adding motors and other gadgets but this is my first step. I am going to start out by using the premise that my project will eventually use RS485 to communicate serially from my UNO to the PC via a tether.īased on this I am going to base all my efforts on Serially retrieving the data and processing it through comma separated variables (CSV). I do not want to turn my UNO into a webserver if I can avoid it because of the shortage of memory and this project is just a few of the sensors that I want to use for my project. This project is the beginning of a UROV that I am building from the ground up and this is my first attempt to work with Arduino. I am using an Arduino UNO R3 clone but the connections I believe are the same for most Arduino’s or can be easily modified for your particular model. Being new to Arduino I was a bit overwhelmed by the different ways to do things.
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